IMFSourceReader::GetStreamSelection method (mfreadwrite.h)

Queries whether a stream is selected.

Syntax

HRESULT GetStreamSelection(
  [in]  DWORD dwStreamIndex,
  [out] BOOL  *pfSelected
);

[in] dwStreamIndex

The stream to query. The value can be any of the following.

Value	Meaning
0–0xFFFFFFFB	The zero-based index of a stream.
MF_SOURCE_READER_FIRST_VIDEO_STREAM 0xFFFFFFFC	The first video stream.
MF_SOURCE_READER_FIRST_AUDIO_STREAM 0xFFFFFFFD	The first audio stream.

[out] pfSelected

Receives TRUE if the stream is selected and will generate data. Receives FALSE if the stream is not selected and will not generate data.

If this method succeeds, it returns S_OK. Otherwise, it returns an HRESULT error code.

This interface is available on Windows Vista if Platform Update Supplement for Windows Vista is installed.

Requirement	Value
Minimum supported client	Windows 7, Windows Vista and Platform Update Supplement for Windows Vista [desktop apps \| UWP apps]
Minimum supported server	Windows Server 2008 R2 [desktop apps \| UWP apps]
Target Platform	Windows
Header	mfreadwrite.h